Although he and Kate Middleton did not answer media questions after presenting their newborn son on the stairs of the Lindo Wing at St. Mary's Hospital on Monday, the royal father told the audience that they were "Very happy, pleased" about her new supplement when he secured his newborn son on his car seat before going home to Kensington Palace.
With three fingers, William smiled and said, "Three times you are worried now."
The royal baby was introduced to the world only seven hours after the birth of Kate.
"We have not kept you waiting too long," joked William about her brief hospital stay.
Prince William, Kate Middleton and her newborn son
Prince William, Kate Middleton and their newborn son  Tim Rooke / REX / Shutterstock [1 9659011] Kate saw Jenny Packham in a red dress with a white collar (almost identical to the dress Princess Diana wore after the birth of Prince Harry) after visiting her favorite stylist Natasha Archer from Linda Wing an hour before the birth of the King
RATED VIDEO: Prince George and Princess Charlotte visit Royal Baby at the hospital
The new baby, whose name was not disclosed, had some visitors before leaving the hospital: Big brother Prince George, 4, who was still wearing his school uniform, and the big sister Princess Charlotte, who turns 3 in May and her royal wave for the Gathered Delightfully Demonstrated
Prince George, Prince William and Princess Charlotte
David Fisher / REX / Shutterstock
At a Kensington Palace event in February, William admitted he As much sleep as possible before he and Kate signed up for omed baby # 3.
"Our third child is due to come in April, I get as much sleep as I can," he told one of his guests, to which they replied he can save time by getting twins. William then replied, "Gemini? I think my sanity would be tested with twins."
William then told another guest, "Two are alright – I do not know how I'll handle three, I'll Permanently tired.  RELATED: Unsuspecting Couple Surprised by Cameras Expecting the Royal Baby's Debut Outside the Lindo Wing
Kensington Palace announced that Kate was born on Monday after hospitalization in the early morning
"Your Royal Highness The Duchess of Cambridge was safely released from a son at 11:01 am," the statement said. "The baby weighs 8, 7oz. The Duke of Cambridge was present at birth. "
" The Queen, the Duke of Edinburgh, the Prince of Wales, the Duchess of Cornwall, Prince Harry, and members of both families were informed and delighted with the news, "The testimony went on." Her Royal Highness and her Children are fine. "
Can not get enough of the coverage of PEOPLE Royals? Sign up for our newsletter for the latest updates on Kate Middleton, Meghan Markle, and more!
First At times in history, a female royal place in the line of succession will not be struck by the arrival of a younger brother.Thanks to the Act of Succession of 2013, the order of birth determines who will become the next king or queen of the United Kingdom, regardless of gender Not having been in place, Charlotte would have lost her place when Kate gave birth to a boy.
The royal baby bl Eibt after Prince Charles, Prince William, Prince George and Princess Charlotte the fifth in a row.
With On arrival, Prince Harry is now sixth in the series, and Prince Andrew, Princess Beatrice and Princess Eugenie will take a place in the line of succession with the arrival of William and Kate's younger son.